Darkhorse Motor Company

Darkhorse Motor Company The Industry Leading Harley-Davidson Crankshaft Remanufacturing and Crankcase Services. Motor Sprocket & Crankshaft Products.
(6)

Like and Subscribe to our Youtube channel www.youtube.com/
Instagram:

NVP Milwaukee, we’re back!Darkhorse will be at the NVP Dealer Expo on September 12–13.Stop by our booth to check out:• T...
09/04/2026

NVP Milwaukee, we’re back!
Darkhorse will be at the NVP Dealer Expo on September 12–13.
Stop by our booth to check out:
• The new KINGPIN Crowned Pinion Race
• Tech support + product walkthroughs
Dealers - stop by our booth and sign up for a limited edition Darkhorse Motor Co sign for your shop!
Booth #702
See you in Milwaukee.

233.742 MPH. Fastest Harley-Davidson in History.Darkhorse Motor Company congratulates Hiro Koiso Racing on setting a new...
09/02/2026

233.742 MPH. Fastest Harley-Davidson in History.

Darkhorse Motor Company congratulates Hiro Koiso Racing on setting a new AMA national record of 233.742 mph in the 3000 APS‑PBF class at the Bonneville Salt Flats, officially the fastest sit‑on Harley-Davidson ever recorded.

The JIMS/T‑Man 135ci Twin Cam, ProCharger boost, JIMS FAT6 transmission, WPC‑treated internals, and Worldwide Bearings all come together to put serious power to the salt.

This achievement is a testament to what focused engineering and relentless refinement can accomplish. We at Darkhorse Motor Co are always proud to see Harley‑Davidson performance pushed to its absolute limit.

Photo credit: Taka Masui Photography

Huge thank you to the DD Custom Cycles team for trusting Darkhorse Genuine Parts in your performance builds. It’s always...
08/10/2026

Huge thank you to the DD Custom Cycles team for trusting Darkhorse Genuine Parts in your performance builds. It’s always an honor to see our components in the hands of true craftsmen pushing the industry forward. Dave Dupor DD CUSTOM CYCLE

07/31/2026

Testimonial's from one of the best engine builders should never be taken lightly, especially in a race set up & all that race experience translates to the best longevity on the street

Sturgis bound? Our trusted dealers will hook you up with genuine Darkhorse Motor Co. products:Cycle Solutions Inc. Black...
07/29/2026

Sturgis bound?
Our trusted dealers will hook you up with genuine Darkhorse Motor Co. products:

Cycle Solutions Inc.


Black Hills Harley-Davidson

07/27/2026

Saddle up with Seth for a hard-earned win in the Bagger Racing League GP Class this weekend at Mid-Ohio.

Big shoutout to Tucker Speed for helping us relive the moment!

07/27/2026

Crowned Pinion Races — the King Pin of accuracy and longevity.

At Darkhorse, we developed a crowned profile that supports natural flywheel flex, keeps alignment true, and delivers unmatched stability at the main bearing/crank interface. Tested under extreme load, installable on new or used cranks, and superior to every OEM and aftermarket option. This is the race that upgrades any build to Darkhorse‑level integrity.

Trust genuine Darkhorse MoCo products in all your builds.

07/24/2026

Coming into the weekend like…
BRL Mid‑Ohio is ON. Tune in and help us cheer on Seth Dahmer and the Tucker Speed crew.

07/15/2026

Precision engineering built in every crankshaft, right down to correct wristpin & connecting rod alignment explained with our state of the Art Tobin-Arp Pin Boring machine.

Address

10629 Highway 42
Newton, WI
53063

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

(920) 726-9999

Website

Alerts

Be the first to know and let us send you an email when Darkhorse Motor Company posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Business

Send a message to Darkhorse Motor Company:

Shortcuts

Share